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mCP X Blade Micro CPx Helicopters Information and Help


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Old 10-24-2015, 08:35 PM   #1
ionosphere80
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Default Shakes

The older of my two mCP X helis starts shaking (elevator?) during the transition from ground to hover and periodically during the transition from hover to fast forward or backward flight, regardless of rotor RPM. Bumping the skids lightly on the ground often triggers shaking too. The shakes usually disappear after a few seconds, but sometimes last longer. Neither cleaning the servo contacts nor swapping the main rotor head (blades, hub, swash, shaft, and gear) from my other heli resolved the problem. Given the flight time on this heli and newer models on the market, I'm willing to spend a little money chasing this gremlin, but probably not enough to replace all of the servos. What should I try next? Main shaft bearings? Swap more parts with the other heli to narrow it down?
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Old 10-25-2015, 05:08 AM   #2
danb1974
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If servos are in good shape (with th engaged move sticks slowly, both ail/ele and throttle, watch for twitching), check swashplate rubber rings and check for any excessive play (or binding) between servos, swash and blade holders
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Old 10-25-2015, 10:32 AM   #3
MariaFan
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Definitely check the swash over.
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Old 10-25-2015, 11:52 AM   #4
ionosphere80
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I think I can rule out blades, hub, swash, shaft, and gear because swapping the entire assembly with my other heli (without shakes) didn't resolve the problem. Comparing the two helis, I can't detect any difference in the pushrods or links, so I didn't swap them... but I could try it. I'm also debating swapping the elevator servo since the motion appears to impact pitch the most.
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Old 10-25-2015, 03:08 PM   #5
ionosphere80
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I swapped the elevator servo and the original shake that I could reproduce switching between fast forward and fast reverse flight moved with the elevator servo, so maybe that's one problem. However, the previously solid heli now shakes randomly with no consistent way to reproduce it.
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Old 10-30-2015, 11:08 PM   #6
Imzzaudae
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A small bend in the feathering shaft.
Clean the servos.
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mCP X Blade Micro CPx Helicopters Information and Help

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